Spot Scaling overview
What is Spot Scaling?
Spot Scaling proactively monitors your AWS Auto-Scaling Groups (ASGs) and replaces all or some of an ASG's On-Demand EC2 instances with Spot Instances, using advanced algorithms analysis.
By managing your ASGs, Spot Scaling takes care of your launch templates, configuration, mixed instances policies, and a myriad of other configuration settings so you can focus on core activities.
What are the benefits?
Reliable & Safe — Spot Scaling works with AWS native Auto Scaling Groups. Spot Scaling follows Spot Instance Best Practices and supports fallback to On-Demand.
No cost overhead — you get the full spot discount provided by AWS.
Quick and Easy — enable in less than 5 minutes with CloudFormation StackSets. After essentially two clicks, your Auto Scaling Group is Spot optimized.
No vendor lock-in — you can decide to stop using it at any time by creating a new request for our support team and revert back to what your ASGs were configured as prior to enabling the features.
How does it work?
Spot Scaling runs in the background, integrating natively with your AWS Auto Scaling Groups, and monitors the configuration and potential savings within each group.
Spot Scaling recommends the most suitable configuration for your Auto Scaling Group to run reliably and cost-effectively while simultaneously presenting the associated monthly potential savings vs. on-demand. You can accept your recommendations as-is or modify them as you see fit.
After you apply the recommendations, Spot Scaling updates your Auto Scaling Group to work in a mixed instances policy. In addition, Spot Scaling replaces On-Demand Instances with Spot Instances according to the recommended settings (which you can change anytime in the CMP).
When Spot Scaling cannot spin up Spot Instances due to lack of spot capacity, it can be configured to automatically fall back to On-Demand to ensure availability and revert to Spot Instances as soon as possible. As a result, the system uptime for your app(s) are maximized, while EC2 costs are minimized.
Spot Scaling continuously assesses your Auto Scaling Groups and presents important metrics such as:
- Spot and On-Demand hours
- Savings for the previous and the current month
- Savings for all time
Scenario: 50 m5.xlarge instances; replacing 80% of On-Demand Instances with Spot Instances
|Without Spot Scaling||With Spot Scaling|
|Monthly Cost||50 instances × $0.192 × 730h = $7,008||10 instances × $0.192 × 730h = $1,401|
40 instances × $0.0399 × 730h = $1,165
Total cost = $1,401 + $1,165 = $2,566
|Monthly Savings $||$0||$4,442|
|Monthly Savings %||0%||63%|